10-28-2016, 04:29 PM
http://www.nostalgiaair.org/pagesbymodel...013512.pdf
Value of the resistor isn't particularly critical as it's in the positive side of the hv. If it was in the negative side then it would change the amount of negative bias voltage available. So looks like the original is about 500ohms, I would go a bit higher around 1000-1500ohm @ 2-5W. You'll need to boost the value of the filter caps too as the resistor isn't very efficient at eliminating hum like a choke is. Would use 2-47mf @160v.
Value of the resistor isn't particularly critical as it's in the positive side of the hv. If it was in the negative side then it would change the amount of negative bias voltage available. So looks like the original is about 500ohms, I would go a bit higher around 1000-1500ohm @ 2-5W. You'll need to boost the value of the filter caps too as the resistor isn't very efficient at eliminating hum like a choke is. Would use 2-47mf @160v.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
